CRYOGENIC ENTRY Russian patent published in 2005 - IPC

FIELD: cryogenic engineering; cooling parts to be measured.

SUBSTANCE: proposed cryogenic entry has heat exchanger incorporating part holder. Heat exchanger is disposed in vacuum chamber and communicates with first pipeline for feeding cooling agent and with second pipeline for cooling agent discharge. Pipeline joints in vacuum chamber are made in the form of first and second heat bypasses. Second pipeline is connected to shield. The latter functions to shield first pipeline and heat exchanger, as well as part holder. Heat exchanger incorporates chambers disposed in tandem and separated by perforated walls. First chamber communicates with first pipeline and last chamber, with second pipeline. These chambers are filled with heat-conducting filler in the form of balls. These balls are joined together so that through holes are provided between junction areas. First chamber is filled with balls of diameter d1 and second one, with balls of diameter d2. Joined balls filling first chamber form through holes of area S1 and area of through holes of those filling second chamber is S2, Here d1 < d2 and S1 < S2. Second chamber is provided with third cooling agent feeding pipeline. Part holder is secured on heat exchanger.

EFFECT: improved design.

6 cl, 5 dwg